diff --git a/runtime/doc/options.txt b/runtime/doc/options.txt
index 8b655dc..74bab42 100644
--- a/runtime/doc/options.txt
+++ b/runtime/doc/options.txt
@@ -4877,6 +4877,10 @@
 							*lcs-space*
 	  space:c	Character to show for a space.  When omitted, spaces
 			are left blank.
+							*lcs-lead*
+	  lead:c	Character to show for leading spaces.  When omitted,
+			leading spaces are blank.  Overrides the "space"
+			setting for leading spaces.
 							*lcs-trail*
 	  trail:c	Character to show for trailing spaces.  When omitted,
 			trailing spaces are blank.  Overrides the "space"